Temperature Compensated Crystal Oscillators(TCXO)
Surface Mount Type TCXO (LSI Type)
KT18B Series
5.0×3.2A
Features
How to Order
• Ultra-miniature SMD Type
(5.0x3.2x1.5mm)
KT18B - D C V 30 - 19.680M - T
q
w e r t y
u
i
• Reflow compatible
• AFC function available
• 2.3 to 3.5V drive available
• Frequency Stability
qType
wFrequency stability
tSupply Voltage
28 2.8V 30 3.0V
yOption Code
K
E
D
5ppm
2.5ppm
2.0ppm
:
2.0ppm at -30°C to +85°C
uFrequency(MHz)
13.000 19.200 19.800
14.400 19.440 26.000
16.800 19.680
Applications
• PDC, GSM, CDMA
eLower operating temp
C
E
G
−30°C
−20°C
−10°C
iPackaging
Pb Free
RoHS Conforming
T
Tape & Reel
4,000pcs/Reel
rUpper operating temp
W
V
U
85°C
80°C
75°C
Specifications
Item
Symbol
Conditions
Min.
13
Max.
26
Units
Output Frequency Range
FOUT
MHz
vs Temperature
−2.0
−0.2
−0.3
−40
−30
−1
+/−8
2.3
0.8
-----
+2.0
+0.2
+0.3
+85
+85
1
Frequency Stability
∆
f/fo
vs Load
ppm
vs Voltage
Storage Temp. Range
Operating Temp. Range
Aging
Voltage control range
Supply Voltage
Output Voltage
Current Consumption
Duty Ratio
TSTG
°C
°C
TOPR
∆
faging
Per Year
Positive
ppm
ppm
Volt
Vp-p
mA
%
∆f/V
+/−15
3.5
VDD
Vout
IDD
10k ohm // 10pF
@50% VDD
-----
2.0
SYM
-----
40
60
Harmonics
-----
- 5
d B c
Dimensions
Test Circuit
Recommended Land Pattern (Unit : mm)
(Unit : mm)
5.0 0.2
Test circuit 1
(Amplitude)
MARKING AREA
#1pin Marking
A
Oscilloscope
(100MHz)
2.95 0.15
POWER
4
3
#4pin
#3pin
V
SUPPLY
Vcc
VC-TCXO
2
1
CL=10pF
10%
10kΩ
Vcon
10%
CL include Probe Capacitance
2.95 0.15
w
q
Test circuit 2
(Harmonics & Frequency)
#1pin
1.3
#2pin
1.3
A
Spectrum Analyzer
& Counter
Pin Configuration
Vcon
GND
OUTPUT
+Vcc
FET
POWER
4
3
VC-TCXO
r
e
q
w
e
r
PROBE
V
SUPPLY
0.95 0.1
1
2
Vcc
CL=10pF
10%
10kΩ
Dimension:(mm)
Vcon
10%
CL include Probe Capacitance